There is a whole book about U297, apparently it was dived on just a couple years ago, the wreck off the coast of Scotland in 285 feet of water. This website gives a little bit of info about the expedition:
http://www.beyondmagazine.co.uk/wreck/u297.htm
Here is a pic of U297 in drydock in 1943:

Unfortunatly the U297 was not as lucky as me it seems, sunk by a Sunderland aircraft while snorkeling Dec. 6th 1944, losing all 50 hands. It was the first and only patrol for the boat, it was sunk so quickly that not even a distress call was sent out.